Homekit Devices Say "No Response" to remote access.
My Homekit devices were working fine when I accessed them remotely on my iPhone. Now they always say "No Response" to my phone; however, I accessed them remotely today from my Nissan dealer, using the dealer's WiFi and my iPad. Remote access worked fine. I can't find any difference in the settings on the two devices. I also tried powering down and restarting the phone, but that didn't change anything.
I can access the devices with my phone if I'm at home and on the same WiFi network as they're on (2.4 GHZ).
iPhone XR, iOS 15